I mean, your own reference says in the very first line, "The earliest record of soybean milk is on a stone slab of the Eastern Han dynasty unearthed in China, on which is engraved the situation of making soy milk in ancient kitchens."
Following the link to the Eastern Han Dynasty shows its timeline to be between 25–220 AD, which supports the saying of "thousands of years" by the skin of its teeth, so you saying their statement is bullshit is disproved by the rest of your own statement.
Following the link to the Eastern Han Dynasty shows its timeline to be between 25–220 AD, which supports the saying of "thousands of years" by the skin of its teeth, so you saying their statement is bullshit is disproved by the rest of your own statement.